Cutter knife



FIG. 1 is a front elevational view of a cutter knife showing my new design,

FIG. 2 is a rear elevational view thereof,

FIG. 3 is a right side elevational view thereof,

FIG. 4 is a top plan view thereof,

FIG. 5 is a bottom plan view thereof,

FIG. 6 is a left side elevational view thereof,

FIG. 7 is a front elevational view thereof putting out its blade and retractable finger holder,

FIG. 8 is a sectional view taken from line VIII in FIG. 1,

FIG. 9 is a sectional view taken from line IX in FIG. 1, and

FIG. 10 is a sectional view taken from line X in FIG. 7. 

The ornamental design for a cutter knife, as shown and described. 